#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2018/12/9 12:19
# @Author  : lizhen
# @Site    : 
# @File    : container.py
# @Software: PyCharm


class CustomContainer:
    def __len__(self):
        pass

    def __getitem__(self, item):
        pass

    def __setitem__(self, key, value):
        pass

    def __delitem__(self, key):
        pass

    def __reversed__(self):
        pass
